Improvement in fruit-jars



tinird s55/tutes @met @Wire Letters Patent No. 94,248, dated August 31, 1869.

IMPROVEMENT IN FRUIT-JARS.

The' Schedule `referred to in these Letters Patent and making pari;r o! the same.

To all whom it may concern:

Be it known that I, HENRY E. SHAFFER, of the city of Rochester, in the county of Monroe, and State of New York; have invented a certain new and useful Improvement in Fruit-Jars; andI do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings,

making part of this VYspecilication, in which the fgnre shows a central vertical secuonof myimproved jar.

My invention consists in the arrangement of the clamping-apparatus, for holding the cover, as hereinafter described.

In the drawingsv A indicates the jar, and B, the cover, the latter having a sunken centre, a, leaving a raised shoulder, e, all aroundy on the inside .of the cover, as clearly shown.

A clamp, C, rests over the top of the jar, having claws b b, which catch under the shoulder o, or equivaient lugsblown in the jar-neck.

Through the centre of this clamp passes a screw, D, its lower end resting on the middle of a spring bar, E,

which extends across the cavity a, and rests on the shoulder e, on opposite sides ofthe cover.

Guide-pins d d, made solid with the spring bar, extend up through holes in the clamp-bar, thus connecting the parts, and combining the whole in one device.

The novelty in this invention consists in combining the spring bar and pins with the clamp, and employing the same in connection with a-cover, which has a concave top. The clamp-bar and screw have-before been used alone, the screw striking' down directly on top of the glass cover.- v

The difficulty in such case is, first, there can be no elasticity or spring, as the contact is rigid between the screw and cover; and, second, this rigid contact produces frequent breakage of the cover, when considerable pressure is applied.

By the employment of the spring bar and the concave top, I avoid the rigid contact, and secure a great degree of elasticity.

By combining the, spring bar with the. clamp, by means of the guide-pins, the former is always presented properly inthe centre of the cover, without any adjusting bythev hands. And by connecting the parts by the heads ff, as shown, the whole is combined andl Vforms one common device.

This arrangement of the parts I believe to be original with myself.

What I claim as my invention, and desire to secure by Letters Batent, is

The combination of the spring bar E and guide-pins d d, with the clamp G and screw D, the whole arranged substantially as described, and operating in the manner and for the purpose specified.

-In witness whereof', I have hereunto signed my name,

in the presence of two subscribing witnesses.

v H. E. SHAFFER.

Titnesses R. F. Oseoon, GEO. W. MIAT'T. 

